Tubular sheet metalware manufacture



Jan. 31, 1939. w IRVEN 2,145,834

TUBULAR SHEET METALWARE MANUFACTURE Fil ed A r l 16, 1936 2 Sheets-Sheet1 I 1% .I -5 .e-. e

' INVENTOR.

%7 /am 114 BY ATTORNEYZ Patented Jan. 31 1939 UNITED STATES PATENTOFFICE TUBULAR SHEET METALWARE MANUFACTURE William Irven, Lakewood,Ohio, assignor to The Standard Oil Company (Ohio), Cleveland,

Ohio, a corporation of Ohio Application April 16, 1936, Serial No.74,808

9 Claims. This invention relates to sheet metal ware production; and itisamong the objects of the.

[invention to accurately and quickly provide tubular sheet metalarticles with a close fitting :slidable end. Other objects andadvantageswill appear as the description proceeds;

To the accomplishment of the foregoing and related ends, the invention,then, comprises the features hereinafter fully described, andparticularly pointed out in the claims, the following description andthe annexed drawings setting forth in detail certainxillustrativeembodiments of the invention, these being indicative however, of but afew of the various ways in which the principle of the invention may beemployed.

In-said annexed drawings Fig. 1 is a front elevational view of apparatusin accordance with the invention; Fig. 2 is a side .and Fig.7 isa planview'o thereof.

elevational view; Fig. 3 is a view similar to Fig. 1, showinga blank inplace and the parts in section; Fig. 4 is a similar fragmentarysectional view on enlarged scale; Figs. 5 :and 6 are front and sideelevational details, on stillfurther enlarged scale; 'oneof the clampjaws In its general aspects, the invention contemplates a framesupportand opposed plungers with :means for operating, and a heating collar.The frame F may be of any desired character, conveniently for. instanceangle iron frame element andface plates of more or less complete extentat the :front thereof. Mounted on the frame is a A 'jplunger 4 havingsuitable operating means, me-

,chanical or manual, and for instance conveniently comprising a footpedal 5 pivoted at 6 to the frame and connected by a link I to a lever 8which is fulcrumed at'9, and connects at Ill to the lower. end of theplunger 4. Suitable bearings I I on the frame support the plunger forreciprocative movement. On the upper end of the plunger is a head havinga work support I 2, and laterally-opening clamping-jaws [3, these beingmounted conven- .iently for instance in slideways l4 in the head .(seeFigs. 5 and 6), the slideways receiving the projecting guide-fins l5 ofthe clamping-members such as to allow reciprocative movement thereofinto clamping and unclamping position to engage the work-piece.Spring-means l1 con- .necting, preferably on each side, between lugs [8on the clamping-membera serves to draw the clamping-members toward eachother into relation with the work-support l2 which is fixed, as

' Tbyscrew-threaded engagement, to the upper" end ,offthe, plunger 4..The lower portions of the ,cla mpingeme'mbers 3 are taperedorbeveledininto open position when the 4 is in its lower position. Returnto such lower or tween arms points of fixation 24 on the face of thesupport An adjustable collar 25 on the plunger is .19

ternally at Hi, to coact with a wedge cam 20 I which is stationarilycarried on the frame. With this, the clamping-elements I3 are spreadapart work support plunger normal position may be assured by suitablemeans, gravity or spring means 22 connecting be- 23 on the plunger andstationary frame. advantageous for exact regulation of the height towhich the plunger and work support is thrust in operation.

In opposing relation to the lower plunger is another plunger 30 slidablymounted in suitable lbearings 3| on the frame. The plunger 30 isreciprocatively moved by suitable operating means,

for instance spring means 36 serves to bring the plunger normally intoelevated position. Such spring means may be attached to arms 31 plungerand to pins 38 carried by the frame. An

adjustable collar 40 on the plunger serves to regulate the extent of itsmovement in working direction. Carried on the lower end of the plunger30 is a head 42, preferably by screw-threaded en-.

gagement with the plunger stem. Desirably, the

plunger head 42 is castellated or provided with air ports, such as bybeing axially peripherally grooved, as shown particularly in Figs. 1 and2, to prevent vacuum action in a draw-back stroke,

and thereby insure separation of the plunger head from the sheet metalelement which it has been operating upon. In the path of the plungerhead .42 isa heating collar 44, this being provided with suitableheating means of any convenient char- }.acter, for instancesteam-supplyrpipes 45 valve controlled at 46, and an annular heatpassageway 41 is thus presented effectively on the interior Lof theheating collar.

In operation, a cylindrical sheet metal article 5 is placedon the worksupport l2, the latter" being in its lower position, the jaws beingopen;

and the plunger 4 carrying the same is raised by theoperatorpressing thepedal 5 and as the jaws V l.3f1eave thecam wedge 20 which up to thistimeon the 30 has held them apart, the clamping jaws seize onto thecylindrical article 50 and grip it tightly on. the work head, the jawsI3 being undercut or stepped to accurately engage over the flange of thearticle. At the same time, the operator supplies a sheet metal pistonblank 5| on the top of the heating collar 44; and the lower plungerhaving raised the upper end of the sheet metal article 50 into theheating collar, the operator pulls the hand lever 32 and thrusts theupper plunger downwardly, thereby forcing the sheet metal pistonelementfii down into position in the tubular wall 50 in final position.Release of the handle 32 allows withdrawal of the plunger head 42; andrelease ofthe pedal 5 allows withdrawal of the work support head 12, theclamping jaws l3 gripping the cam flange strip the cam from the plunger42 and. heating collar 44, and as the clamping jaws I3 again lower intoposition over the cam wedge 20, the jaws are opened, and the operatorremoves the completed article 50, and places a new blank in position."Such sheet metal articles as for instance sheet metal containers on theorder of grease cartridges are thus particularly advantageouslyprepared. Application of heat as indicated, to the upper portion of thecylindrical blank or can-like body permits of fitting the insertedpiston element very closely, thereby particularly making possible aclose and durable construction for use of the device in extrudinglubricant contents, without back-leakage.

Other modes of applying the principle of the invention may be employed,change being made as regards the details described, provided thefeatures stated in any of the following claims, or the equivalent ofsuch, be employed.

I therefore particularly point out and distinctly claim as myinvention:-

1. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding a cylindricalsheet metal blank, laterally-separable clamping jaws on said head, astationary wedge cam in the path of said jaws for opening them, springmeans for closing said jaws, a foot pedal and link and lever foroperating said plunger, spring means for returning the same, a plungerhead on said other plunger for forcing a sheet metal piston element intosaid cylindrical sheet metal blank and having air-escape ports, astationary heating collar in the path of said latter head and permittingits passage therein, steam connections for heating said collar, a handlever for operating said latter head, a roller on the end of saidheadcarrying plunger having a groove to receive the edge of said handlever, a clevis in association with the roller to retain said lever insuch groove, and spring means for returning said plunger and hand lever.

2. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding a cylindricalsheet metal blank, laterally-separable clamping jaws on said head, astationary wedge cam in the path of said jaws for opening them, springmeans for closing said jaws, a foot pedal and link and lever foroperating said plunger, spring means for returning the same, a plungerhead on said other plunger for forcing a sheet 'metal piston elementinto said cylindrical sheet metal blank and having air-escape ports, astationary heating collar in the path of said latter headand permittingits passage therein, means for heating said collar, a hand lever foroperating said latter head, a roller on the endof said head-carrying'drical sheet metal blank,

plunger having a groove to receive the edge of said hand lever, a clevisin association with the roller to retain said lever in such groove, andspring means for returning said plunger and hand lever.

3. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding a cylindricalsheet metal blank, laterally-separable clamping jaws on said head, astationary wedge cam in the path of said jaws for opening them, springmeans for closing said jaws, a foot pedal and link and lever foroperating said plunger, spring means for returning the same, a plungerhead on said other plunger for forcing a sheet metal piston element intosaid cylindrical sheet metal blank and having air-escape ports, astationary heating collar in the path of said latter head and permittingits passage therein, means for heating said collar, a hand lever foroperating said latter head, a roller on the end of said head-carryingplunger having a groove to receive the edge of said hand lever, andspring means for returning said plunger and hand lever.

4. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding a cylindricalsheet metal blank, laterally-separable clamping jaws on said head, astationary wedge cam in the path of said jaws for opening them, springmeans for closing said jaws, a foot pedal for operating said plunger,spring means for returning the same, a plunger head on said otherplunger for forcing a sheet metal piston element into said cylindricalsheet metal blank and having air-escape ports, a stationary heatingcollar in the path of said latter head and permitting its passagetherein, means for heating said collar, a hand lever for operating saidlatter head, a

roller on the end of said head-carrying plunger having a groove toreceive the edge 'of said hand lever, and spring means for returningsaid plunger and hand lever.

5. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a. head for forwarding acylindrical sheet metal blank, laterall y separable clamping jaws onsaid head, a stationary wedge cam in the path of said jaws for openingthem, spring means for closing said jaws, a foot pedalfor operating saidplunger, means for returning the same, a plunger head on said otherplunger for forcing a sheet metal piston element into saidcylindricalsheet metal blank'and having air-escape ports, a stationary heatingcollar in the path of said latter head andpermitting its passagetherein, means for heating said collar, a hand lever for operating saidlatter head, a roller on the end 'of said head-carrying plunger having agroove to receive the edge of said hand lever, and spring means forreturning said plunger and hand lever.

6. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding acylinlaterally-separable clamping jaws on said head, means for openingsaid jaws, means for closing said jaws, a foot pedal for operating saidplunger, means for returning the same, a plunger head on said otherplunger for forcinga sheet metal piston element' into said cylindricalsheet metal blank and having air-escape ports, a stationary'heatingcollar in the path of saidlatter head and permitting its passagetherein, means for heating said, collar, a hand lever for operating saidlatter said hand lever, and spring means for returning saidplung-er andhand lever.

7. In mechanism of the character described, a support-frame, opposedplunger carried thereby,

one having a head for forwarding a cylindrical sheet met-a1 blank,laterally separable clamping jaws on said head, means for opening saidjaws,

means for closing said jaws, a foot pedal for operating said plunger,means for returning the ,same,'a plunger head on said other plunger forforcing a sheet metal piston element into said cylindrical sheet metalblank, a stationary heating collar in the path of said latter head andpermitting its passage therein, means for heating said collar, a handlever for operating said latter head, and means for returning saidplunger and hand lever.

8. In mechanism of the character described, a support-frame, opposedplungers carried thereby, one having a head for forwarding acylindrical'sheet metal blank, laterally-separable clamping jaws on saidhead, means for opening said jaws, means for closing said jaws, a footpedal for operating said plunger, means for returning the same, aplunger head on said other plunger for forcing a sheet metal pistonelement into said cylindrical sheet metal blank, a stationary heatingcollar in the path of said latter head and permitting its passagetherein, means for heating said collar, and means for reciprocativelymoving said latter head.

9- In mechanism of the character described, a support-frame, opposedplunger heads carried thereby, one for forwarding a cylindrical sheetmetal blank and having laterally separable clamping jaws, means foropening said jaws, means for closing said jaws, the other said plungerhead being adapted to assemble a piston element in said cylindricalsheet metal blank, a heating collar in the path of one of said plungerheads and permitting its pass-age therein, and means for reciprocativelymoving said latter plunger head.

WILLIAM IRVEN.

